摘要
针对目前半柔性路面胶凝材料(如水泥基等)易溶蚀、高收缩、低流态等问题,将矿渣粉引入赤泥体系中进行复合,构建了赤泥-矿渣粉二元体系胶凝材料。为明确该胶凝材料的灌注效果、路用性能及抗滑功能性,采用电感耦合等离子体发射光谱仪(ICP)研究赤泥基胶凝材料在冻融循环下的重金属离子溶出情况;采用CT扫描和锥束滤波反投影重构的方式对灌浆养护7 d后的赤泥基半柔性路面进行效果评价;采用马歇尔稳定度试验、低温弯曲破坏试验和自主研发的轮式加速加载磨光机及配套试验,评价赤泥基半柔性路面的基本路用性能和抗滑功能。结果表明,赤泥和矿渣粉的掺量比为1∶1、水灰比为0.85时,赤泥基胶凝材料对基体沥青混合料灌浆效果最优;开发的赤泥基胶凝材料具有环境污染小、流动度好、力学强度高等优点;赤泥基胶凝材料灌注过后得到的半柔性沥青混合料灌浆效果良好,满足半柔性路面的各项技术标准,且适用于中国南方湿热多雨地区。在实际应用中,应在灌浆结束后对赤泥基半柔性路面进行表面处理以保证其抗滑性能。
In view of the problems of easy corrosion, high shrinkage and low fluidity of the current semi-flexible pavement cementitious materials(such as cement-based, etc.), slag powder was introduced into red mud system to composite, and a red mud-slag powder binary system cementitious material was constructed. In order to clarify the perfusion effect, road performance and skid resistance of the cementitious material, inductively coupled plasma(ICP) emission spectrometer was used to study the dissolution of heavy metal ions of red mud-based cementitious material under freeze-thaw cycles. CT scanning and cone beam filter back projection reconstruction were used to evaluate the effect of red mud-based semi-flexible pavement after 7 days of grouting maintenance. Marshall stability test, low-temperature bending failure test and wheel accelerated loading polishing machine and related tests were used to evaluate the basic road performance and skid resistance of red mud-based semi-flexible pavement. The results show that when the ratio of red mud and slag powder is 1∶1 and the water cement ratio is 0.85, the red mud-based cementitious material has the best grouting effect on the matrix asphalt mixture. The developed red mud-based cementitious materials have the advantages of small environmental pollution, good fluidity and high mechanical strength. The grouting effect of semi-flexible asphalt mixture obtained by red mud-based cementitious material perfusion is good, which meets the technical standards of semi-flexible pavement and is suitable for humid and rainy areas in southern China. In practical application, the surface treatment of red mud base semi-flexible pavement should be carried out after grouting to ensure its sufficient skid resistance. 9 tabs, 17 figs, 33 refs.
作者
刘家庆
谭茜文
何延全
郑锴
王红伟
何玉林
谢宁
王大为
LIU Jia-qing;TAN Qian-wen;HE Yan-quan;ZHENG Kai;WANG Hong-wei;HE Yu-lin;XIE Ning;WANG Da-wei(Guangxi Xinfazhan Communications Group Co.,Ltd,Nanning 530029,Guangxi,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China;Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250001,Shandong,China;Institute of Highway Engineering,RWTH Aachen University,Aachen 52074,Nordrhein-Westphalia,Germany)
出处
《长安大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第5期21-32,共12页
Journal of Chang’an University(Natural Science Edition)
基金
国家重点研发计划项目(2019YFE0116300)
黑龙江省自然科学基金重点项目(JJ2020ZD0015)。
关键词
道路工程
铺装材料
半柔性路面
赤泥基胶凝材料
road engineering
pavement material
semi-flexible pavement
red mud-based cementitious material
作者简介
刘家庆(1984-),男,山东菏泽人,高级工程师,E-mail:252773078qq.com;通讯作者:王大为(1981-),男,黑龙江绥芬河人,教授,博士研究生导师,E-mail:dawei.wang@hit.edu.cn。
